War Room is a great addition to any mono-color (or colorless) Commander deck, since it allows you to pay three mana and one life to draw a card , plus it produces colorless mana without coming into play tapped
In particular, were looking at his second ability, which can draw many (or few) cards, depending on how big your creatures are
Niv-Mizzet, Parun One of favorite Izzet powerhouses is this 6 mana 5/5 uncounterable flying powerhouse that costs all of the mana
additionally, if Robin Hood himself is banished in a Challenge, you can draw a card
Jace, the Mind Sculptor I dont know what it is about Jace, the Mind Sculptor, but something about the incredible power level of this card paired with its long-term seat on the banlist make it such an ominous and powerful card
If you are on a budget, building decks around classic Disney villains or less-collected franchises is a highly competitive, cost-effective alternative